Apparatus for manufacturing window/door frames or bent metal products

ABSTRACT

Provided is an apparatus for manufacturing window/door frames or bent metal products, in which a forming roll set that forms window/door frames or bent metal products includes upper and lower surface support rollers, left and right side support rollers and forming rollers, and that makes the upper and lower surface support rollers and the left and right side support rollers transfer a uniform force to a plate-shaped or sheet member, to thus prevent a reaction force to be caused by the forming rollers that form the plate-shaped member and to thereby fundamentally block a wave phenomenon from occurring in the plate-shaped or sheet member that passes through the forming roll set. 
     The forming roll set includes: upper and lower support rollers; cylindrical folding rollers; and cylindrical left and right side surface support rollers. Accordingly, a wave phenomenon is fundamentally blocked from occurring during forming a plate-shaped or sheet member.

TECHNICAL FIELD

The present invention relates to an apparatus for manufacturingwindow/door frames or bent metal products, and more particularly, to anapparatus for manufacturing window/door frames or bent metal products,in which the window/door frame or bent metal product manufacturingapparatus is configured to include upper and lower surface supportrollers, left and right side support rollers and forming rollers as aforming roll set that forms window/door frames or bent metal products,to thus prevent a reaction force that the forming rollers influence upona plate-shaped member during a process that the upper and lower surfacesupport rollers and the left and right side support rollers support theplate-shaped or sheet member, and to thereby fundamentally block a wavephenomenon from occurring in the plate-shaped or sheet member thatpasses through the forming roll set.

BACKGROUND ART

In general, insulation windows/doors have an insulation function and asoundproof function, and are mainly used extensively for general houses,commercial houses, apartment houses, apartment building with stores,offices, etc. Aluminum or PVC is used as a material of the insulationwindows or doors. The insulation windows or doors include a sash that isfixed on a wall and a window/door frame that is hinge-combined with thesash. Meanwhile, a structural stainless steel plate-shaped or sheetmember for producing the insulation windows/doors is standardized by 1 mwide and 3 m or 4 m long, and sold on the market. However, a windowframe of a general commercial store in the first floor is 2.6 m-2.7 mhigh. Therefore, an expensive stainless steel plate of 3 m long is cutinto not more than 2.7 m and then abandoned remnants of 30 cm long ormore are disposed as scrap metal. In addition, since the stainless steelplate is standardized to l1 wide, a lot of remnants and leftovers occurwhen it is cut to be manufactured into a window/door frame, to thenbecome a great cause of rising cost and cause a big waste of resources.

In addition, a frame bending process includes: the steps of sequentiallypressing a V-cut portion of a sheet member with a blade of a foldingmachine; making a required angle; sequentially turning and bending thesheet member upside down while replacing the blade of the foldingmachine depending upon a frame, to thereby complete the frame. Further,a fraction defective and a product quality may be determined accordingto ability of an artisan. Although the conventional frame bendingprocess has the above-described defects, a traditional processing methodof bending a window/door frame has been performed by only a bendingmethod using a conventional folding machine.

Also, the window/door frame that is made using the conventional foldingmachine is weak in view of soundproof, wind resistance and dustproof,and especially is poor in view of insulation property, to thereby causeenergy loss during air-conditioning. Mohair grooves exist in upper andlower H-type bars of a reinforced glass door, respectively, in order torealize soundproof, wind resistance, and dustproof, in which mohair isfitted into the mohair grooves. Here, the H-type bars are stainlesssteel frames that are fitted in the upper and lower ends of thereinforced glass door to thus protect glass and to make a floor hingelot attached and fixed to the stainless steel frames. However, there aregaps between the stainless steel frame and the reinforced glass door.Dusts and winds may be easy to come in through the gaps. In order toprevent dusts and winds from coming in through the gaps, paper weatherstrips or tapes are attached to the stainless steel frame and thereinforced glass door to block the gaps, to accordingly cause poorappearance and no practicality.

Meanwhile, to solve these problems, the present applicant filed a KoreanPatent Application No. 2006-85246 entitled a window/door framemanufacturing apparatus including a pinch roll set and a forming rollset that can make a plate-shaped member for the window/door frame movefreely, on Sep. 5, 2006, and registered as a Korean Patent No. 0791647,to thus selectively apply a physical pressure to a bent portion of aproduct and to accordingly enhance an economical efficiency as well asprovide a more convenient manufacturing process.

By the way, since the plate-shaped member that is formed using theabove-described frame manufacturing apparatus, are made to contact theupper and lower structure of the forming roll set, on a surface tosurface basis, a physical force is not uniformly transferred to aportion of the plate-shaped member to be bent during bending. As aresult, a wave phenomenon that the plate-shaped member becomes unevenhas occurred.

In other words, the conventional forming roll set is designed to makethe plate-shaped member contact each other on a surface to surface basisusing upper rollers and lower rollers, and to rotate to make theplate-shaped member transformed into an appropriate shape. However,since a forming roll of a portion to be bent is configured into aconical shape, a first half portion and a second half portion of theforming roll set are made to rotate once at an identical time.Accordingly, there is a difference between a distance through which thefirst half of the forming roll set rotates and a distance through whichthe second half of the forming roll set rotates. Therefore, since thesecond half of a big diameter moves farther than the first half during atime that the first half of a small diameter rotates by a shorterdistance than the second half, the physical force that is applied to theplate-shaped member is not identical in the first and second halves. Asa result, the wave phenomenon occurs during bending the plate-shapedmember.

Finally, since a uniform force is not transferred to the plate-shapedmember during bending the plate-shaped member using the conventionalforming roll set, the wave phenomenon that the plate-shaped memberbecomes uneven cannot be avoided.

DISCLOSURE OF THE INVENTION

To solve the above problems, it is an object of the present invention toprovide an apparatus for manufacturing window/door frames or bent metalproducts, in which a forming roll set adopts upper and lower surfacesupport rollers and left and right side support rollers at the upper andlower portions and the left and right sides of a plate-shaped or sheetmember, to thus stably support the plate-shaped or sheet member and tothen form window/door frames or bent metal products, and transfers auniform physical force to the plate-shaped or sheet member, to therebyfundamentally block a wave phenomenon from occurring in the plate-shapedor sheet member that passes through the forming roll set.

To accomplish the above object of the present invention, according to anaspect of the present invention, there is provided an apparatus formanufacturing window/door frames or bent metal products, the apparatuscomprising:

a puncher 10 that partially punches a V-cut plate-shaped or sheet memberto make a chamfer on the V-cut plate-shaped or sheet member;

a leveler 20 that presses upper and lower portions of the plate-shapedor sheet member with a roller to heighten flatness of the plate-shapedor sheet member;

a number of groups of pinch roll sets 30 that are configured into activetype upper and lower roller shapes that receive power transmitted fromoutside to thus compulsively transfer the plate-shaped or sheet member,and that are arranged in a straight line at regular intervals to thusenable the plate-shaped or sheet member to be continuously transferredin various forming operation sections; and

a number of groups of forming roll sets 40 that are arranged in theforming operation section that is placed in the middle of the pinch rollsets at regular intervals and applies a constant pressure on theplate-shaped or sheet member that is transferred through the pinch rollsets, to thereby make the plate-shaped or sheet member selectively bent,

wherein each of the forming roll sets 40 comprises;

upper and lower support rollers 40 a and 40 b that are installed on theupper or lower surface of the plate-shaped or sheet member or the upperand lower surfaces thereof, and whose cylindrical outer circumferentialsurfaces closely contact the plate-shaped or sheet member, to thussupport the upper or lower surface of the plate-shaped or sheet memberor the upper and lower surfaces thereof that move through the pinch rollsets;

folding rollers 42 a and 42 b that are installed on the inner or outersurface of the plate-shaped or sheet member, and whose cylindrical outercircumferential surfaces closely contact the inner or outer surfaces ofthe plate-shaped or sheet member, to thus apply a uniform pressure tothe plate-shaped or sheet member to thereby form a three-dimensionalplate-shaped or sheet member whose side surface is bent; and

left and right side surface support rollers 41 a and 41 b that areinstalled on the side surface of the plate-shaped or sheet member, andwhose cylindrical outer circumferential surfaces closely contact thevertical surface of the plate-shaped or sheet member that has been bentinto the three-dimensional plate-shaped or sheet member by the foldingrollers 42 a and 42 b, to thus support the plate-shaped or sheet memberto thereby maintain the plate-shaped or sheet member into a verticallybent shape.

In addition, each of the forming roll sets 40 further comprises upperand lower auxiliary support rollers 43 a and 43 b that are installed atboth sides of the upper and lower support rollers 40 a and 40 b, andthat auxiliarily support the upper or lower surface or both of the upperand lower surfaces of the plate-shaped or sheet member.

In addition, the upper and lower support rollers 40 a and 40 b and theleft and right side support rollers 41 a and 41 b are configured to havea cylindrical structure in which the edges of upper and lower supportrollers 40 a and 40 b and the left and right side support rollers 41 aand 41 b contact the upper and lower surfaces of the plate-shaped orsheet member or the left and right side surfaces thereof on a surface tosurface basis.

In addition, the upper and lower support rollers 40 a and 40 b and theleft and right side support rollers 41 a and 41 b are configured to havea disc-shaped structure in which the edges of upper and lower supportrollers 40 a and 40 b and the left and right side support rollers 41 aand 41 b contact the bent portion of the plate-shaped or sheet member ona line to line basis.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects and advantages of the present invention willbecome more apparent by describing the preferred embodiments thereof indetail with reference to the accompanying drawings in which:

FIG. 1 is a configurational diagram showing an apparatus formanufacturing window/door frames that is applied in the presentinvention;

FIG. 2 is a configurational diagram showing motors that are applied inthe present invention;

FIGS. 3A through 3E are configurational diagrams showing pinch roll setsthat are applied in the present invention;

FIG. 4 shows a working state of a first working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction;

FIG. 5 shows a working state of a second working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent perpendicularly in the lower direction;

FIG. 6 shows a working state of a third working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the upper direction, around a central portionof the plate-shaped or sheet member;

FIG. 7 shows a working state of a fourth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent perpendicularly in the upper direction, around a central portionof the plate-shaped or sheet member;

FIG. 8 shows a working state of a fifth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction, around a central portionof the plate-shaped or sheet member, at a state where the centralportion of the plate-shaped or sheet member is maintained at rightangles;

FIG. 9 shows a working state of a sixth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent perpendicularly in the horizontal direction, at a state wherethe central portion of the plate-shaped or sheet member is maintained atright angles;

FIG. 10 shows a working state of a seventh working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction;

FIG. 11 shows a working state of an eighth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent perpendicularly in the lower direction; and

FIG. 12 shows an actual installation of the working embodiment of thepresent invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinbelow, an apparatus for manufacturing window/door frames,according to preferred embodiments of the present invention will bedescribed with reference to the accompanying drawings. Like or similarfunctional blocks or elements are denoted by like or similar referencenumerals through the drawings. The detailed description of the relevantknown functions or elements will be omitted in order to avoid the gistof the present invention from being blurred unnecessarily.

FIG. 1 is a configurational diagram showing an apparatus formanufacturing window/door frames that is applied in the presentinvention, and FIG. 2 is a configurational diagram showing motors thatare applied in the present invention. As shown in FIGS. 1 and 2, anapparatus for manufacturing window/door frames that is applied in thepresent invention, largely includes a puncher 10, a leveler 20, a pinchroll set 30, a forming roll set 40 and an electric motor set 50. Thepuncher 10 is installed to perform chamfering operations that isrequired at regular intervals on a V-cut plate-shaped or sheet member,to thereby perform the chamfering operations while unwinding aplate-shaped or sheet member that is wound in a coil form. The leveler20 consists of upper and lower rollers and presses the V-cutplate-shaped or sheet member from the top and bottom portions of theplate-shaped or sheet member, to thereby heighten flatness of theplate-shaped or sheet member and thus produce products of a betterquality.

FIGS. 3A through 3E are configurational diagrams showing pinch roll sets30 that are applied in the present invention. As shown in FIGS. 3Athrough 3E, various types of the pinch roll sets 30 may be provided. Thepinch roll set 30 is an active roller that compulsively transfers theplate-shaped or sheet member, and includes an upper roller 30 a and alower roller 30 b. The upper roller 30 a is formed into a cylindricalshape without flection and is connected to an electric motor to thusreceive external power and to then rotate, and the lower roller 30 b isformed into a variety of curves as forms of forming the plate-shaped orsheet member that coincides with each stage of the operation, to thustransfer the plate-shaped or sheet member smoothly. Flection is formedin the lower roller in correspondence to the shape of the formedplate-shaped or sheet member.

In other words, a reason why the lower roller 30 b of the pinch roll set30 is formed so as to have a variety of types of flection is because aform of the plate-shaped or sheet member is formed at each manufacturingstep, and flection should be formed along with this form of theplate-shaped or sheet member, to accordingly enable the lower roller 30b to move smoothly.

These pinch roll sets 30 are installed at regular intervals to thus makea plate-shaped or sheet member to be formed move to other formingoperation sections smoothly.

The configuration of the puncher 10, the leveler 20, the pinch roll sets30, and the electric motor set 50 according to the present invention isthe same as that of the conventional art, but the configuration of theforming roll sets 40 that are positioned in the middle of the pinch rollset 30s differs from that of the conventional art, to thus fundamentallyprevent a wave phenomenon of the plate-shaped or sheet member and tothereby complete a product of the bent window/door frame.

FIG. 4 shows a working state of a first working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction. FIG. 5 shows a workingstate of a second working embodiment of the present invention in whichboth ends of a plate-shaped or sheet member is bent perpendicularly inthe lower direction. FIG. 6 shows a working state of a third workingembodiment of the present invention in which both ends of a plate-shapedor sheet member is bent by 45 degrees in the upper direction, around acentral portion of the plate-shaped or sheet member. FIG. 7 shows aworking state of a fourth working embodiment of the present invention inwhich both ends of a plate-shaped or sheet member is bentperpendicularly in the upper direction, around a central portion of theplate-shaped or sheet member.

As shown in FIGS. 4 through 7, the forming roll set 40 according to thepresent invention includes upper and lower support rollers 40 a and 40b, upper and lower auxiliary support rollers 43 a and 43 b, left andright side support rollers 41 a and 41 b and folding forming rollers 42a and 42 b.

The upper and lower support rollers 40 a and 40 b are disc-shaped orcylindrical rollers that are coupled with support shafts. The upper andlower support rollers 40 a and 40 b whose rotating surfaces closelycontact the upper and lower surfaces of the plate-shaped or sheetmember, play a role of supporting the upper and lower surfaces of theplate-shaped or sheet member. The upper and lower support rollers 40 aand 40 b do not rotate by a separate power source but rotate by a powersource of the pinch roll sets while contacting the plate-shaped or sheetmember when the plate-shaped or sheet member compulsively moves by thepower source of the pinch roll sets.

The left and right side support rollers 41 a and 41 b are disc-shaped orcylindrical rollers that are coupled with support shafts. The left andright side support rollers 41 a and 41 b whose rotating surfaces closelycontact the left and right side surfaces of the plate-shaped or sheetmember, play a role of supporting the left and right side surfaces ofthe plate-shaped or sheet member. Like the upper and lower supportrollers 40 a and 40 b, the left and right side support rollers 41 a and41 b do not rotate by a separate power source but rotate by the powersource of the pinch roll sets while contacting the plate-shaped or sheetmember when the plate-shaped or sheet member compulsively moves by thepower source of the pinch roll sets.

As described above, the upper and lower support rollers 40 a and 40 b orthe left and right side support rollers 41 a and 41 b contact theplate-shaped or sheet member simultaneously. As a result, although thefolding forming rollers 42 a and 42 b apply a force to the plate-shapedor sheet member 100, the upper and lower portions and left and rightsides of the plate-shaped or sheet member are bent stably.

FIG. 10 shows a working state of a seventh working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction. Further, as shown in FIG.10, the upper and lower auxiliary support rollers 43 a and 43 b areadditionally installed at the sides of the upper and lower supportrollers 40 a and 40 b, respectively, as necessary. Accordingly, anoperation of forming the upper and lower portions or the left and rightside portions of the plate-shaped or sheet member is easily performed ata state where the plate-shaped or sheet member is more stably supported,to thereby block a wave phenomenon of the plate-shaped or sheet member.

FIG. 11 shows a working state of an eighth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent perpendicularly in the lower direction. In addition, as shown inFIG. 11, at least one of the upper and lower support rollers 40 a and 40b is fabricated into a disc-shaped roller, to thus make a sloped edgeportion that is positioned at the end of the roller contact theplate-shaped or sheet member on a line to line basis when in use and tothereby press the plate-shaped or sheet member. As a result, at leastone of the upper and lower support rollers 40 a and 40 b that isfabricated into a disc-shaped roller plays a role of assisting toperform the bending operation of the plate-shaped or sheet member morestably, and the other one of the upper and lower support rollers 40 aand 40 b plays a role of supporting movement of the plate-shaped orsheet member, to thereby make the plate-shaped or sheet member movestably.

On the following, the folding forming rollers 42 a and 42 b will bedescribed in more detail.

The folding forming rollers 42 a and 42 b are installed on lateralsupport shafts that are bent at a certain angle, respectively.Accordingly, the folding forming rollers 42 a and 42 b rotate at a statewhere they have been bent at a certain angle, respectively. Theplate-shaped or sheet member contacts the rotating surfaces of thefolding forming rollers 42 a and 42 b, to then be bent.

In other words, the plate-shaped or sheet member is three-dimensionallybent by the folding forming rollers 42 a and 42 b. In this case, thefolding forming rollers 42 a and 42 b are installed in pairs so as tocorrespond to both sides of the plate-shaped or sheet member, to thusbend both sides of the plate-shaped or sheet member simultaneously.Here, since the plate-shaped or sheet member contacts the foldingforming rollers 42 a and 42 b uniformly on a surface to surface basis, awave phenomenon is fundamentally prevented from occurring in theplate-shaped or sheet member.

In other words, according to the conventional art, a cone-shaped formingroller contacts the plate-shaped or sheet member on a surface to surfacebasis, in order to bend the plate-shaped or sheet member. Accordingly,the first and second half portions of the cone-shaped forming rollercause difference between the one-revolution moving distances thereofduring rotation of the cone-shaped forming roller, to thereby cause awave phenomenon to occur when the plate-shaped or sheet member is bent.

However, according to the present invention, the upper and lower supportrollers 40 a and 40 b, the left and right side support rollers 41 a and41 b, the upper and lower auxiliary support rollers 43 a and 43 b, andthe folding forming rollers 42 a and 42 b all of which are configuredinto cylindrical or disc-shape rollers and whose one-revolution movingdistances are same, are adopted, to thereby make the folding formingrollers 42 a and 42 b bend the plate-shaped or sheet member at a stateof stably supporting the plate-shaped or sheet member 100, and toaccordingly make it possible to bend the plate-shaped or sheet memberwithout causing a wave phenomenon to occur in the plate-shaped or sheetmember. In particular, the moving distances of the folding formingrollers 42 a and 42 b when they rotate are same in the first and secondhalf portions of the rollers 42 a and 42 b, to thereby make theplate-shaped or sheet member bent stably and to thus prevent a wavephenomenon from occurring in the plate-shaped or sheet member. Asdescribed above, the plate-shaped or sheet member is supported and bentusing the upper and lower support rollers 40 a and 40 b, the left andright side support rollers 41 a and 41 b, the upper and lower auxiliarysupport rollers 43 a and 43 b, to thereby fundamentally prevent the wavephenomenon from occurring in the plate-shaped or sheet member.

For reference, the folding forming rollers 42 a and 42 b have beendescribed and depicted in pairs in the drawings and embodiments of thepresent invention, but a folding forming roller may be installed at onlyone side of the plate-shaped or sheet member, to thereby make itpossible to bend only one side of the plate-shaped or sheet member. Inother words, when only one folding forming roller is disposed at onlyone side of the plate-shaped or sheet member to bend one side of theplate-shaped or sheet member, it is possible to bend only one side ofthe plate-shaped or sheet member without bending both sides of theplate-shaped or sheet member.

FIGS. 4 to 7 show that a plate-shaped or sheet member is bent with thefolding forming rollers at a state where the upper and lower supportrollers 40 a and 40 b are provided, respectively. Here, the foldingforming rollers that are sloped by 45 or 90 degrees contact theplate-shaped or sheet member on a surface to surface basis to then bendthe plate-shaped or sheet member, during a process that the upper andlower support rollers 40 a and 40 b stably support the plate-shaped orsheet member and make the plate-shaped or sheet member move. In thiscase, the folding forming rollers 42 a and 42 b are formed into thecylindrical shape, to thus prevent the wave phenomenon from occurringduring bending of the plate-shaped or sheet member. Moreover, theplate-shaped or sheet member is three-dimensionally formed by thefolding forming rollers 42 a and 42 b.

FIG. 8 shows a working state of a fifth working embodiment of thepresent invention in which both ends of a plate-shaped or sheet memberis bent by 45 degrees in the lower direction, around a central portionof the plate-shaped or sheet member, at a state where the centralportion of the plate-shaped or sheet member is maintained at rightangles. FIG. 9 shows a working state of a sixth working embodiment ofthe present invention in which both ends of a plate-shaped or sheetmember is bent perpendicularly in the horizontal direction, at a statewhere the central portion of the plate-shaped or sheet member ismaintained at right angles.

FIGS. 8 and 9 show left and right side support rollers 41 a and 41 b.

In FIG. 8, the perpendicular bending surfaces of a plate-shaped or sheetmember are supported by the left and right side support rollers 41 a and41 b, at a state where the central portion of the plate-shaped or sheetmember has been bent at right angles, and both sides of the upperportion of the plate-shaped or sheet member are bent by 45 degrees atthe state where the central portion of the plate-shaped or sheet memberhas been bent at right angles. For this purpose, the folding formingrollers 42 a and 42 b that are sloped by 45 degrees are disposed on theupper portion of the plate-shaped or sheet member 100. Accordingly, itis possible to stably support the central portion of the plate-shaped orsheet member with the left and right side support rollers 41 a and 41 band bend the upper portion of the plate-shaped or sheet member 100 by 45degrees.

In FIG. 9, the perpendicular bending surfaces of a plate-shaped or sheetmember are supported by the left and right side support rollers 41 a and41 b, at a state where the central portion of the plate-shaped or sheetmember has been bent at right angles, and both sides of the upperportion of the plate-shaped or sheet member are bent in the horizontaldirection at the state where the central portion of the plate-shaped orsheet member has been bent at right angles. Accordingly, it is possibleto bend both sides of the plate-shaped or sheet member 100 using thefolding forming rollers 42 a and 42 b at a state where the centralportion of the plate-shaped or sheet member has been supported by theleft and right side support rollers 41 a and 41 b. In other words, theleft and right side support rollers 41 a and 41 b support theperpendicular bending surfaces of the plate-shaped or sheet member at astate where the plate-shaped or sheet member has beenthree-dimensionally formed by the folding forming rollers 42 a and 42 b.Here, the folding forming rollers 42 a and 42 b form both sides of theplate-shaped or sheet member again at a state where the left and rightside support rollers 41 a and 41 b have supported the perpendicularbending surfaces of the plate-shaped or sheet member.

FIGS. 10 and 11 show that a plate-shaped or sheet member 100 is bentusing the folding forming rollers 42 a and 42 b at a state where theupper surface roller 40 a is provided and upper and lower auxiliarysupport rollers 43 a and 43 b are disposed. That is, FIGS. 10 and 11show that a plate-shaped or sheet member 100 is bent by 45 or 90 degreesin a desired shape at a state where the plate-shaped or sheet member isstably supported by the upper surface roller 40 a and the upper andlower auxiliary support rollers 43 a and 43 b. As shown, since the uppersurface roller 40 a and the upper and lower auxiliary support rollers 43a and 43 b stably support the plate-shaped or sheet member, and furtherthe cylindrical folding forming rollers 42 a and 42 b bend theplate-shaped or sheet member, the wave phenomenon can be prevented inadvance from occurring un the process of bending the plate-shaped orsheet member 100.

FIG. 12 shows an actual installation of an example of the presentinvention. As shown, a number of supporting bars are provided. In FIG.12, the supporting bars are configured to pass through the foldingforming rollers 42 a and 42 b and the lower auxiliary support roller 43b, at a state where the supporting bars have been configured to passthrough the upper and lower support rollers 40 a and 40 b. In this waythe plate-shaped or sheet member is bent at a certain angle. In otherwords, the plate-shaped or sheet member 100 is made to move by movementof the pinch roll set, at a state where all of the upper and lowersupport rollers 40 a and 40 b, the upper and lower auxiliary supportrollers 43 a and 43 b, the left and right side support rollers 41 a and41 b, and the folding forming rollers 42 a and 42 b are fixed to thesupporting bars. Excepting for FIG. 12, the supporting bars are omittedfor convenience of explanation of the remaining elements of the otherdrawings according to the present invention.

The operation of the present invention will be described as follows.

First, as shown in FIGS. 1 through 3, forming roll sets 40 that aredenoted as A1 to A4, B1 to B4 and C1 to C4 are disposed according to amodel of a window/door frame and are properly distributed between pinchroll sets 30 that are denoted as X1 to X7.

If the forming roll sets 40 are completely distributed, the pinch rollsets 30 are driven by motors 50, to thereby make the plate-shaped orsheet member 100 compulsively move. The plate-shaped or sheet member 100passes through the leveler 20 and is chamfered at the puncher 10, tothen enter the pinch roll sets 30. Of course, the plate-shaped or sheetmember is at a state that it has been completely V-cut.

Then, the plate-shaped or sheet member passes through the selectedforming roll sets 40 to thus selectively bending the V-cut portion to bebent to be completed into a desired type of a model.

In this case, the forming roll set 40 slowly bends the plate-shaped orsheet member 100 while employing a variation of a proper angle. When theforming roll set 40 bends the plate-shaped or sheet member by 90degrees, it is desirable that the former slowly bends the latter twotimes 45 degrees by 45 degrees. FIGS. 4 through 11 show that a certainshape of a plate-shaped or sheet member is fabricated in sequence usingthe folding forming rollers 42 a and 42 b, at a state where the upperand lower surfaces or the left and right side surfaces of theplate-shaped or sheet member by the upper and lower support rollers 40 aand 40 b, the left and right side support rollers 41 a and 41 b, and theupper and lower auxiliary support rollers 43 a and 43 b. Thus, it can beseen that the forming roll sets 40 are properly disposed to therebyfabricate a desired shape of the plate-shaped or sheet member insequence without causing a wave phenomenon. The above-describedembodiments of the present invention have been described with respect tothe case that the plate-shaped or sheet member is bent by 45 degrees andthereafter is bent again by 45 degrees in order to bend the plate-shapedor sheet member by 90 degrees. However, it is of course possible to benda plate-shaped or sheet member in sequence by fragmenting a bent angleof the plate-shaped or sheet member in various angles into 30 or 60degrees.

Finally, the present invention includes the forming roll sets 40including the upper and lower support rollers 40 a and 40 b that supportthe upper and lower surfaces of the plate-shaped or sheet member 100,the left and right side support rollers 41 a and 41 b that support theleft and right sides of the plate-shaped or sheet member, and the upperand lower auxiliary support rollers 43 a and 43 b that auxiliarilysupport the upper and lower surfaces of the plate-shaped or sheetmember. In addition, the present invention includes the folding formingrollers 42 a and 42 b that bend the plate-shaped or sheet member byvarious angles. Accordingly, the plate-shaped or sheet member 100 isuniformly bent and simultaneously the wave phenomenon of theplate-shaped or sheet member is fundamentally blocked.

As described above, the present invention has been described withrespect to particularly preferred embodiments. However, the presentinvention is not limited to the above embodiments, and it is possiblefor one who has an ordinary skill in the art to make variousmodifications and variations, without departing off the spirit of thepresent invention. Thus, the protective scope of the present inventionis not defined within the detailed description thereof but is defined bythe claims to be described later and the technical spirit of the presentinvention.

EFFECTS OF THE INVENTION

The present invention includes the forming roll sets including the upperand lower support rollers 40 a and 40 b that closely contact the upperand lower surfaces of the plate-shaped or sheet member to support theupper and lower surfaces of the plate-shaped or sheet member 100, andthe left and right side support rollers 41 a and 41 b that closelycontact the left and right side surfaces of the plate-shaped or sheetmember to support the left and right sides of the plate-shaped or sheetmember, to thereby prevent a reaction that occurs during forming theplate-shaped or sheet member, and also includes the cylindrical foldingforming rollers that closely contact the plate-shaped or sheet member tothus apply a uniform pressure to the plate-shaped or sheet member tobend the plate-shaped or sheet member, and to thereby fundamentallyblock the wave phenomenon from occurring in forming the plate-shaped orsheet member.

1. An apparatus for manufacturing window/door frames or bent metalproducts, the apparatus comprising: a puncher that partially punches aV-cut plate-shaped or sheet member to make a chamfer on the V-cutplate-shaped or sheet member; a leveler that presses upper and lowerportions of the plate-shaped or sheet member with a roller to heightenflatness of the plate-shaped or sheet member; a number of groups ofpinch roll sets that are configured into active type upper and lowerroller shapes that receive power transmitted from outside to thuscompulsively transfer the plate-shaped or sheet member, and that arearranged in a straight line at regular intervals to thus enable theplate-shaped or sheet member to be continuously transferred in variousforming operation sections; and a number of groups of forming roll setsthat are arranged in the forming operation section that is placed in themiddle of the pinch roll sets at regular intervals and applies aconstant pressure on the plate-shaped or sheet member that istransferred through the pinch roll sets, to thereby make theplate-shaped or sheet member selectively bent, wherein each of theforming roll sets comprises: upper and lower support rollers that areinstalled on the upper or lower surface of the plate-shaped or sheetmember or the upper and lower surfaces thereof, and whose cylindricalouter circumferential surfaces closely contact the plate-shaped or sheetmember, to thus support the upper or lower surface of the plate-shapedor sheet member or the upper and lower surfaces thereof that movethrough the pinch roll sets; folding rollers that are installed on theinner or outer surface of the plate-shaped or sheet member, and whosecylindrical outer circumferential surfaces closely contact the inner orouter surfaces of the plate-shaped or sheet member, to thus apply auniform pressure to the plate-shaped or sheet member to thereby form athree-dimensional plate-shaped or sheet member whose side surface isbent; and left and right side surface support rollers that are installedon the side surface of the plate-shaped or sheet member, and whosecylindrical outer circumferential surfaces closely contact the verticalsurface of the plate-shaped or sheet member that has been bent into thethree-dimensional plate-shaped or sheet member by the folding rollers,to thus support the plate-shaped or sheet member to thereby maintain theplate-shaped or sheet member into a vertically bent shape.
 2. Theapparatus for manufacturing window/door frames or bent metal productsaccording to claim 1, wherein each of the forming roll sets furthercomprises upper and lower auxiliary support rollers that are installedat both sides of the upper and lower support rollers and thatauxiliarily support the upper or lower surface or both of the upper andlower surfaces of the plate-shaped or sheet member.
 3. The apparatus formanufacturing window/door frames or bent metal products according toclaim 1, wherein the upper and lower support rollers and the left andright side support rollers are configured to have a cylindricalstructure in which the edges of upper and lower support rollers and theleft and right side support rollers contact the upper and lower surfacesof the plate-shaped or sheet member or the left and right side surfacesthereof on a surface to surface basis.
 4. The apparatus formanufacturing window/door frames or bent metal products according toclaim 1, wherein the upper and lower support rollers and the left andright side support rollers are configured to have a disc-shapedstructure in which the edges of upper and lower support rollers and theleft and right side support rollers contact the bent portion of theplate-shaped or sheet member on a line to line basis.